Subtract 30/54 from 72/42, Solve 1 30/42

Subtract 30/54 from 72/42

1^st number: 1 30/42, 2^nd number: 30/54

72/42 - 30/54 is 73/63.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 54 is 378

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 42 × 9 = 378,
72/42 = 72 × 9/42 × 9 = 648/378
Likewise, for the 2nd fraction, since 54 × 7 = 378,
30/54 = 30 × 7/54 × 7 = 210/378
Subtract the two like fractions:
648/378 - 210/378 = 648 - 210/378 = 438/378
After reducing the fraction, the answer is 73/63
In mixed form: 110/63

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